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B767-300 first officer misuses the autoplt for a descent procedure and airspeed restr during the civet STAR arrival procedure, resulting in a speed deviation.
| Attributes | |
| ACN | 370510 |
| Time | |
| Date | 199705 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : lax |
| State Reference | CA |
| Altitude | msl bound lower : 9000 msl bound upper : 10000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other arrival star : star enroute airway : lax |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 9000 flight time type : 300 |
| ASRS Report | 370510 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 17000 flight time type : 2600 |
| ASRS Report | 370349 |
| Events | |
| Anomaly | non adherence : clearance non adherence : published procedure non adherence : far other anomaly other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : became reoriented |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Initially we were assigned a speed of 320 KTS or greater until advised. At 5-7 mi prior to the arnes intersection we were advised to cross arnes at 250 KTS. The autoplt was in the VNAV mode and programmed for arnes at 245 KTS. Speed brakes were used to slow the aircraft. Shortly thereafter we were cleared for the ILS runway 25L approach. Through habit I engaged the 'approach' mode of the autoplt on receiving that call. That engaged the speed at the existing speed of about 280 KTS. I then realized I still needed the autoplt in VNAV for the stepdown fixes on the approach. Since the autoplt had already engaged in the approach mode, I had to disengage the autoplt and both flight directors before re-engaging in VNAV. Through all of this, we continued our descent toward the next fix, suzzi, at 9000 ft. Once the autoplt was re- engaged in VNAV, I noticed the airspeed about 280 KTS. We slowed to 250 KTS resulting in 1-2 mins below 10000 ft above 250 KTS. During this brief period the captain was busy identing the ILS frequency and starting the approach checklist.
Original NASA ASRS Text
Title: B767-300 FO MISUSES THE AUTOPLT FOR A DSCNT PROC AND AIRSPD RESTR DURING THE CIVET STAR ARR PROC, RESULTING IN A SPD DEV.
Narrative: INITIALLY WE WERE ASSIGNED A SPD OF 320 KTS OR GREATER UNTIL ADVISED. AT 5-7 MI PRIOR TO THE ARNES INTXN WE WERE ADVISED TO CROSS ARNES AT 250 KTS. THE AUTOPLT WAS IN THE VNAV MODE AND PROGRAMMED FOR ARNES AT 245 KTS. SPD BRAKES WERE USED TO SLOW THE ACFT. SHORTLY THEREAFTER WE WERE CLRED FOR THE ILS RWY 25L APCH. THROUGH HABIT I ENGAGED THE 'APCH' MODE OF THE AUTOPLT ON RECEIVING THAT CALL. THAT ENGAGED THE SPD AT THE EXISTING SPD OF ABOUT 280 KTS. I THEN REALIZED I STILL NEEDED THE AUTOPLT IN VNAV FOR THE STEPDOWN FIXES ON THE APCH. SINCE THE AUTOPLT HAD ALREADY ENGAGED IN THE APCH MODE, I HAD TO DISENGAGE THE AUTOPLT AND BOTH FLT DIRECTORS BEFORE RE-ENGAGING IN VNAV. THROUGH ALL OF THIS, WE CONTINUED OUR DSCNT TOWARD THE NEXT FIX, SUZZI, AT 9000 FT. ONCE THE AUTOPLT WAS RE- ENGAGED IN VNAV, I NOTICED THE AIRSPD ABOUT 280 KTS. WE SLOWED TO 250 KTS RESULTING IN 1-2 MINS BELOW 10000 FT ABOVE 250 KTS. DURING THIS BRIEF PERIOD THE CAPT WAS BUSY IDENTING THE ILS FREQ AND STARTING THE APCH CHKLIST.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.